Fix model name being a type in TS abstract codegen (#16392)

* fix model name being a type in ts abstract codegen

* add a test

* better code format

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AbstractTypeScriptClientCodegen.java

@@ -512,9 +512,9 @@ public abstract class AbstractTypeScriptClientCodegen extends DefaultCodegen imp
 
     @Override
     public String toParamName(String name) {
-        // obtain the name from nameMapping directly if provided
-        if (nameMapping.containsKey(name)) {
-            return nameMapping.get(name);
+        // obtain the name from parameterNameMapping directly if provided
+        if (parameterNameMapping.containsKey(name)) {
+            return parameterNameMapping.get(name);
         }
 
         name = sanitizeName(name, "[^\\w$]");
@@ -557,6 +557,11 @@ public abstract class AbstractTypeScriptClientCodegen extends DefaultCodegen imp
 
     @Override
     public String toModelName(final String name) {
+        // obtain the name from modelNameMapping directly if provided
+        if (modelNameMapping.containsKey(name)) {
+            return modelNameMapping.get(name);
+        }
+
         String fullModelName = name;
         fullModelName = addPrefix(fullModelName, modelNamePrefix);
         fullModelName = addSuffix(fullModelName, modelNameSuffix);
@@ -630,6 +635,7 @@ public abstract class AbstractTypeScriptClientCodegen extends DefaultCodegen imp
         } else if (ModelUtils.isBinarySchema(p)) {
             return "ArrayBuffer";
         }
+
         return super.getTypeDeclaration(p);
     }
 
@@ -754,6 +760,17 @@ public abstract class AbstractTypeScriptClientCodegen extends DefaultCodegen imp
 
     @Override
     public String getSchemaType(Schema p) {
+        // check if $ref is a model and modelNameMapping is used
+        if (StringUtils.isNotBlank(p.get$ref())) {
+            Schema unaliasSchema = unaliasSchema(p);
+            Schema actualSchema = ModelUtils.getReferencedSchema(openAPI, unaliasSchema);
+            String modelName = ModelUtils.getSimpleRef(unaliasSchema.get$ref());
+
+            if (ModelUtils.isModel(actualSchema) && modelNameMapping.containsKey(modelName)) {
+                return toModelName(modelNameMapping.get(modelName));
+            }
+        }
+
         String openAPIType = super.getSchemaType(p);
         String type = null;
         if (ModelUtils.isComposedSchema(p)) {

modules/openapi-generator/src/test/java/org/openapitools/codegen/typescript/typescriptangular/TypeScriptAngularClientCodegenTest.java

@@ -226,10 +226,10 @@ public class TypeScriptAngularClientCodegenTest {
 
         final String modelName = "FooResponse__links";
         final Schema schema = new Schema()
-            .name(modelName)
-            .description("an inline model with name previously prefixed with underscore")
-            .addRequiredItem("self")
-            .addProperty("self", new StringSchema());
+                .name(modelName)
+                .description("an inline model with name previously prefixed with underscore")
+                .addRequiredItem("self")
+                .addProperty("self", new StringSchema());
 
         OpenAPI openAPI = TestUtils.createOpenAPIWithOneSchema("test", schema);
         codegen.setOpenAPI(openAPI);
@@ -313,4 +313,35 @@ public class TypeScriptAngularClientCodegenTest {
                 "export type Token = ExpressionToken | StringToken"
         );
     }
+
+    @Test
+    public void testModelNameMappings() throws Exception {
+        final String specPath = "src/test/resources/2_0/issue_8289.json";
+
+        Map<String, Object> properties = new HashMap<>();
+        properties.put(TypeScriptAngularClientCodegen.TAGGED_UNIONS, "true");
+
+        File output = Files.createTempDirectory("test").toFile();
+        output.deleteOnExit();
+
+        Map<String, String> modelNames = new HashMap<>();
+        modelNames.put("File", "SystemFile");
+
+        final CodegenConfigurator configurator = new CodegenConfigurator()
+                .setModelNameMappings(modelNames)
+                .setGeneratorName("typescript-angular")
+                .setInputSpec(specPath)
+                .setAdditionalProperties(properties)
+                .setOutputDir(output.getAbsolutePath().replace("\\", "/"));
+
+        final ClientOptInput clientOptInput = configurator.toClientOptInput();
+
+        Generator generator = new DefaultGenerator();
+        generator.opts(clientOptInput).generate();
+
+        TestUtils.assertFileContains(
+                Paths.get(output + "/model/folder.ts"),
+                "files?: Array<SystemFile>;" // ensure it's an array of SystemFile (not Any)
+        );
+    }
 }

modules/openapi-generator/src/test/resources/2_0/issue_8289.json

@@ -0,0 +1,33 @@
+{
+  "swagger": "2.0",
+  "info": {
+    "title": "Test swagger",
+    "version": "0.1.0"
+  },
+  "definitions": {
+    "File": {
+      "title": "File",
+      "type": "object",
+      "properties": {
+        "name": {
+          "type": "string"
+        }
+      }
+    },
+    "Folder": {
+      "title": "Folder",
+      "type": "object",
+      "properties": {
+        "files": {
+          "type": "array",
+          "items": {
+            "$ref": "#/definitions/File"
+          }
+        }
+      }
+    }
+  },
+  "paths": {},
+  "host": "localhost:3000",
+  "schemes": ["http"]
+}